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公开(公告)号：US20180073898A1
公开(公告)日：2018-03-15
申请号：US15699413
申请日：2017-09-08
Applicant: Mitutoyo Corporation
Inventor： Yoshiaki Kato
IPC: G01D5/347
CPC classification number: G01D5/34707 , G01D5/34715 , G01D5/34746
Abstract: An encoder includes a scale having graduations arranged in a measurement direction, a head including a light receiving unit configured to receive, via the scale, light emitted from a light source, and being configured to detect a relative movement amount with respect to the scale by relatively moving in the measurement direction of the scale, and a control unit configured to control the head. The control unit includes a light amount control unit configured to perform control so as to keep a predetermined light receiving amount by increasing or decreasing a light amount of the light source, an error determination unit configured to determine an error based on light received by the light receiving unit, and a light amount suppression unit configured to suppress a light amount of the light source by stopping control performed by the light amount control unit, when the error determination unit determines as an error.
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公开(公告)号：US20180003524A1
公开(公告)日：2018-01-04
申请号：US15199723
申请日：2016-06-30
Applicant: Mitutoyo Corporation
Inventor： Ted Staton Cook
IPC: G01D5/20
CPC classification number: G01D5/20 , G01D5/2497 , G01D5/34776
Abstract: An electronic absolute position encoder is provided including a scale, a detector portion and a signal processing configuration. The scale includes a first scale pattern of signal modulating elements, wherein the first scale pattern includes a spatial characteristic of the signal modulating elements which progressively changes as a function of position along a measuring axis direction and defines an absolute measuring range. The spatial characteristic includes at least one of a spatial wavelength or a spatial frequency of the signal modulating elements and is unique at each unique position in the absolute measuring range. The detector portion includes a group of sensing elements, and the signal processing configuration determines an absolute position of the sensing elements relative to the scale within the absolute measuring range. In various implementations, the signal processing configuration may utilize Fourier transform processing and/or other processing for determining the absolute position.
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公开(公告)号：US20170373463A1
公开(公告)日：2017-12-28
申请号：US15617307
申请日：2017-06-08
Applicant: MITUTOYO CORPORATION
Inventor： Tatsuya NARUMI , Yoichi TOIDA
IPC: H01S3/131 , H01S3/02 , H01S3/04 , H01S3/13 , H01S3/106 , H01S3/109 , H01S3/137 , H01S3/16 , G02F1/355
Abstract: A laser adjustment method includes a first adjustment step and a second adjustment step. In the first adjustment step, using a light detector detecting a second harmonic light, optical intensity and wavelength of the second harmonic light is detected and a first temperature adjuster is adjusted to adjust temperatures of a Nd:YVO4 crystal and a KTP crystal such that the detected wavelength of the second harmonic light approaches a desired wavelength and such that the optical intensity of the second harmonic light reaches at least a predetermined value. In the second adjustment step, after the first adjustment step, a temperature of an etalon is adjusted by a second temperature adjuster such that the detected wavelength of the second harmonic light approaches the desired wavelength and such that the optical intensity of the second harmonic light reaches at least a predetermined value.
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公开(公告)号：US09851224B2
公开(公告)日：2017-12-26
申请号：US14990937
申请日：2016-01-08
Applicant: MITUTOYO CORPORATION
Inventor： Satoshi Adachi , Youhei Toku , Toshihiro Hasegawa
CPC classification number: G01D5/24419 , G01D5/2415
Abstract: A phase detector includes a sampling signal generator configured to generate a sampling signal at an edge of a scale signal, a counter configured to count up a count value according to a clock pulse every certain time and to output the count value at a timing instructed by the sampling signal, an edge polarity determinator configured to determine whether an edge polarity of the scale signal is a rising edge or a falling edge and to generate an adjustment signal when the polarity of the edge where the sampling signal is generated is a falling edge and an adjuster configured to add a predetermined adjustment amount to the count value output from the counter when receiving the adjustment signal.
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公开(公告)号：US20170366714A1
公开(公告)日：2017-12-21
申请号：US15186231
申请日：2016-06-17
Applicant: Mitutoyo Corporation
Inventor： Yuhua Ding
CPC classification number: H04N5/2256 , G02B23/2407 , G02B27/58 , G06T3/4053 , H04N5/2254 , H04N5/23238 , H04N2005/2255
Abstract: A super resolution bore imaging system is disclosed for imaging a cylindrical bore. The system includes a controller, a photodetector configuration having a known pixel geometry, and an imaging arrangement that images bore surface segments onto the photodetector. In one embodiment, the controller is configured to acquire respective combinable sets of raw bore segment image data using the pixels of the photodetector configuration positioned, relative to the bore segment, at respective imaging-Z coordinates which are separated along the bore axial direction by a subpixel shift. In some embodiments, the pixel geometry is configured to provide super resolution along the circumferential direction without a change in position along the circumferential direction between acquiring the respective sets of image data. The controller combines the sets of raw image data to form a super resolution image data for the bore segment.
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Patent Agency Ranking
公开(公告)号：US20170364723A1
公开(公告)日：2017-12-21
申请号：US15623797
申请日：2017-06-15
Applicant: Mitutoyo Corporation
Inventor： Yuto Inoue
IPC: G06K7/14
CPC classification number: G06K7/1417 , G06K7/1443 , G06K19/06037
Abstract: A measurement apparatus includes an image acquisition part that acquires a captured image obtained by imaging a partial area on a two-dimensional scale on which a plurality of two-dimensional codes having a first code, which is specified by a combination pattern of a first pixel value image and a second pixel value image, and a second code, which is specified by a pattern of a type different from the combination pattern, are arranged, a code specification part that specifies the first code and the second code corresponding to the two-dimensional code included in the captured image, and a position specification part that specifies position information on the two-dimensional scale of the two-dimensional code including the first code and the second code on the basis of the first code and the second code.
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公开(公告)号：US09835473B2
公开(公告)日：2017-12-05
申请号：US15087679
申请日：2016-03-31
Applicant: Mitutoyo Corporation
Inventor： Michael Nahum
CPC classification number: G01D5/2006 , G01D5/2086 , G01D5/2451
Abstract: An absolute electromagnetic position encoder comprises a readhead and an absolute scale. The readhead comprises field generation and detection configuration and a readhead processor. The absolute scale comprises an active periodic signal pattern, an active absolute signal pattern, and timing and activation circuitry connected to the active signal pattern. During an energy transfer cycle, the timing and activation circuitry is configured to receive and store energy from the readhead. During a first signal generating cycle, the timing and activation circuitry is configured to drive the periodic spatially modulated signal generating element in order to generate first cycle spatially periodic signals in the first cycle field detector. During a second signal generating cycle, the timing and activation circuitry is configured to drive the first spatially modulated signal generating element in order to provide at least one corresponding second cycle signal in the readhead. The readhead processor is configured to determine an absolute position of the readhead relative to the absolute scale based on at least the second cycle signal and the first cycle spatially periodic signals.
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公开(公告)号：US09829312B2
公开(公告)日：2017-11-28
申请号：US14795555
申请日：2015-07-09
Applicant: Mitutoyo Corporation
Inventor： Yong Xie
CPC classification number: G01C3/08 , G01B11/0608 , G01B2210/50 , G01N21/00 , G01S7/4812 , G01S7/4818 , G01S17/023 , G01S17/46 , G01S17/88 , G06T5/20 , H04N5/2254 , H04N5/2256
Abstract: A chromatic confocal range sensor optical pen comprises a housing, an in/out optical fiber, a chromatically dispersive lens configuration, a reflected light dividing configuration comprising a lower NA zone and a higher NA zone, and a camera portion. The lens configuration is configured to receive source light from the optical fiber and output focused source light to a workpiece surface with axial chromatic dispersion, and receive reflected light from the workpiece surface and focus at least a portion of the reflected light to the fiber aperture. The reflected light dividing configuration is arranged to divide the reflected light into a measurement portion and an imaging portion. In some embodiments, the lower NA zone directs the imaging portion along an imaging optical path to the image detector, and the higher NA zone directs the measurement portion along a measurement optical path to a point proximate to the fiber aperture.
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公开(公告)号：US20170328697A1
公开(公告)日：2017-11-16
申请号：US15514996
申请日：2016-12-21
Applicant: Mitutoyo Corporation
Inventor： Bjorn E.B. Jansson
IPC: G01B3/22
CPC classification number: G01B3/22 , G01B5/012 , G01B21/045
Abstract: A touch probe circuit comprises a displacement sensor having a sensor signal responsive to touch probe stylus displacement, an offset compensation controller, and a difference amplifier. The offset compensation controller provides a varying offset compensation signal to compensate drift in a rest-state signal component of the sensor signal. The difference amplifier inputs the offset compensation signal and the sensor signal and amplifies the difference therebetween to provide an offset compensated displacement signal, which is output to a touch trigger signal generating circuit that provides a touch signal when the stylus touches a workpiece, and is also output to the offset compensation controller. The offset compensation controller portion provides a feedback loop that inputs the offset compensated displacement signal and outputs a responsive low pass filtered offset compensation signal to the difference amplifier, in order to provide the offset compensated displacement signal.
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公开(公告)号：US09812094B2
公开(公告)日：2017-11-07
申请号：US14683571
申请日：2015-04-10
Applicant: MITUTOYO CORPORATION
Inventor： Hiroyuki Hidaka
CPC classification number: G09G5/37 , G01D7/002 , G06F3/1415 , G09G5/02 , G09G5/38 , G09G2310/04 , G09G2340/14
Abstract: A display device for a measuring instrument, includes: a display screen of a graphic display module; and a processing unit for drawing on the display screen a figure changed in position or shape in response to change in measured value, the processing unit is configured to: calculate first coordinates on the display screen based on a pre-changed value of the measured value; draw at least a part of the figure on the display screen based on the first coordinate; calculate second coordinates on the display screen based on a post-changed value of the measured value; acquire as a redrawing region a region on the display screen based on the first coordinates and the second coordinates; and redraw the redrawing region based on a redrawing function for redrawing only a specified region on the display screen.
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